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[u/mrichter/AliRoot.git] / START / AliSTARTv0.cxx
1 /**************************************************************************
2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3  *                                                                        *
4  * Author: The ALICE Off-line Project.                                    *
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10  * copies and that both the copyright notice and this permission notice   *
11  * appear in the supporting documentation. The authors make no claims     *
12  * about the suitability of this software for any purpose. It is          *
13  * provided "as is" without express or implied warranty.                  *
14  **************************************************************************/
15
16 /* $Id$ */
17
18 /////////////////////////////////////////////////////////////////////
19 //                                                                 //
20 // START ( T-zero) detector  version 0                        //
21 //
22 //Begin Html       
23 /*
24 <img src="gif/AliSTARTv0Class.gif">
25 */
26 //End Html
27 //                                                                  //
28 //                                                                  //
29 //////////////////////////////////////////////////////////////////////
30
31 #include <Riostream.h>
32 #include <stdlib.h>
33
34 #include <TGeometry.h>
35 #include <TLorentzVector.h>
36 #include <TMath.h>
37 #include <TNode.h>
38 #include <TTUBE.h>
39 #include <TVirtualMC.h>
40
41 #include "AliMagF.h"
42 #include "AliRun.h"
43 #include "AliSTARThit.h"
44 #include "AliSTARTv0.h"
45
46 ClassImp(AliSTARTv0)
47
48 //--------------------------------------------------------------------
49 AliSTARTv0::AliSTARTv0(const char *name, const char *title):
50  AliSTART(name,title)
51 {
52   //
53   // Standart constructor for START Detector version 0
54   //
55   fIdSens1=0;
56 //  setBufferSize(128000);
57 }
58 //-------------------------------------------------------------------------
59 void AliSTARTv0::CreateGeometry()
60 {
61   //
62   // Create the geometry of START Detector version 0
63   //
64   // begin Html
65   /*
66    <img src="gif/AliSTARTv0.gif">
67   */
68   //
69
70
71   Int_t *idtmed = fIdtmed->GetArray();
72
73   Int_t is;
74   Int_t idrotm[999];
75   Float_t x,y,z;
76
77   Float_t pstart[3]={4.5,10.7,5.3};
78   Float_t pinstart[3]={0.,1.3,5.25};
79   Float_t ppmt[3]={0.,1.3,3.5};
80   Float_t pdivider[3]={0.,1.2,1.75};
81   Float_t pdiv2[3]={0.,1.2,1.25};
82   Float_t pdiv1[3]={0.6,1.2,0.5};
83   Float_t ptop[3]={0.,1.3,1.5};
84   Float_t pbot[3]={0.6,1.2,0.1};
85   Float_t pglass[3]={1.2,1.3,2.};
86   Float_t pcer[3]={0.9,1.1,0.09};
87   Float_t psteel[3]={0.9,1.1,0.01};
88   Float_t ppins[3]={0.6,1.2,0.014};
89   Float_t phole[3]={0.6,1.2,0.015};
90   Float_t pknob[3]={0.5,0.6,0.4};
91   Float_t pknob_vac[3]={0.,0.5,0.4};
92   Float_t pknob_bot[3]={0.,0.6,0.05};
93   Float_t pribber[3] = {0.,1.2,2.413/2.};
94   Float_t presist[3] = {0.,1.2,0.087/2.};
95
96   Float_t zdetRight=69.7,zdetLeft=350;
97  //-------------------------------------------------------------------
98  //  START volume 
99  //-------------------------------------------------------------------
100   
101   //  Float_t theta=TMath::ATan(6.5/zdet);
102   Float_t thetaRight=(180./3.1415)*TMath::ATan(6.5/zdetRight);
103   Float_t thetaLeft=(180./3.1415)*TMath::ATan(6.5/zdetLeft);
104     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
105     
106     gMC->Gsvolu("0STR","TUBE",idtmed[1],pstart,3);
107     gMC->Gsvolu("0STL","TUBE",idtmed[1],pstart,3);
108     gMC->Gspos("0STR",1,"ALIC",0.,0.,zdetRight+pstart[2],0,"ONLY");
109     gMC->Gspos("0STL",1,"ALIC",0.,0.,-zdetLeft-pstart[2],idrotm[901],"ONLY");
110
111 //START interior
112     gMC->Gsvolu("0INS","TUBE",idtmed[1],pinstart,3);
113     gMC->Gsvolu("0PMT","TUBE",idtmed[3],ppmt,3);     
114     gMC->Gsvolu("0DIV","TUBE",idtmed[3],pdivider,3);     
115
116 // first ring: 12 units of Scintillator+PMT+divider
117     Double_t dang1 = 2*TMath::Pi()/12;
118     for (is=1; is<=12; is++)
119       {  
120         AliMatrix(idrotm[901+is], 
121                   90.-thetaRight, 30.*is, 
122                   90.,       90.+30.*is,
123                   thetaRight,    180.+30.*is); 
124         x=6.5*TMath::Sin(is*dang1);
125         y=6.5*TMath::Cos(is*dang1);
126         z=-pstart[2]+pinstart[2];
127         gMC->Gspos("0INS",is,"0STR",x,y,z,idrotm[901+is],"ONLY");
128
129       } 
130     for (is=1; is<=12; is++)
131       {
132         AliMatrix(idrotm[901+is],
133                   90.-thetaLeft, 30.*is,
134                   90.,       90.+30.*is,
135                   thetaLeft,    180.+30.*is);
136
137         x=6.5*TMath::Sin(is*dang1);
138         y=6.5*TMath::Cos(is*dang1);
139         z=-pstart[2]+pinstart[2];
140         gMC->Gspos("0INS",is,"0STL",x,y,z,idrotm[901+is],"ONLY");
141
142       }
143      x=0;
144     y=0;
145     z=-pinstart[2]+ppmt[2];
146     if(fDebug) printf("%s: is %d, z Divider %f\n",ClassName(),is,z);
147     gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
148     z=pinstart[2]-pdivider[2];
149     gMC->Gspos("0DIV",1,"0INS",x,y,z,0,"ONLY");
150       
151      /*  
152 //second ring: 20 units of Scintillator+PMT+divider
153       Double_t dang2 = 2*TMath::Pi()/26;
154       Double_t dang3 = 2*TMath::Pi()/20;
155        for (is=14; is<=33;is++)  
156      {  
157      x=9.3*TMath::Sin(dang2+(is-13)*dang3);
158      y=9.3*TMath::Cos(dang2+(is-13)*dang3);
159       z=-pstart[2]+ppmt[2];
160       gMC->Gspos("0PMT",is,"0STA",x,y,z,0,"ONLY");
161       z=z+ppmt[2]+pdiv2[2];
162       gMC->Gspos("0DIV",is,"0STA",x,y,z,0,"ONLY");
163       }
164      */
165 // PMT
166       
167     // Entry window (glass)
168     // gMC->Gsvolu("0TOP","TUBE",idtmed[6],ptop,3);
169        gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
170      z=-ppmt[2]+ptop[2];
171     gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
172     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
173     
174     // Bottom glass
175     gMC->Gsvolu("0BOT","TUBE",idtmed[6],pbot,3);
176     z=ppmt[2]-pbot[2];
177     if(fDebug) printf("%s: Z bottom %f\n",ClassName(),z);
178     gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
179     // Side cylinder glass
180     gMC->Gsvolu("0OUT","TUBE",idtmed[6],pglass,3);
181     z=ppmt[2]-pglass[2];
182     //      printf("Z glass %f\n",z);
183     gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
184     //PMT electrodes support structure
185     gMC->Gsvolu("0CER","TUBE",idtmed[4],pcer,3);
186     gMC->Gsvolu("0STE","TUBE",idtmed[8],psteel,3);
187     z=-ppmt[2]+2*ptop[2]+0.3;;
188     //      printf("Z Cer 1 %f\n",z);
189     for (is=1; is<=15; is++)
190       {
191         z=z+psteel[2]+pcer[2];
192         gMC->Gspos("0CER",is,"0PMT",0,0,z,0,"ONLY");
193         z=z+psteel[2]+pcer[2];
194         gMC->Gspos("0STE",is,"0PMT",0,0,z,0,"ONLY");
195       }
196     
197     // Divider
198     // Knob at the bottom of PMT baloon
199     
200     gMC->Gsvolu("0NB","TUBE",idtmed[6],pknob,3);
201     z=-pdivider[2]+pknob[2];
202     //      printf("zknob %f\n",z);
203     gMC->Gspos("0NB",1,"0DIV",0,0,z,0,"ONLY");
204     gMC->Gsvolu("0KB","TUBE",idtmed[6],pknob_bot,3);
205     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
206     //      printf(knobbot %f\n",z);
207     gMC->Gspos("0KB",1,"0DIV ",0,0,z,0,"ONLY");
208     gMC->Gsvolu("0VAC","TUBE",idtmed[3],pknob_vac,3);
209     z=-pdivider[2]+pknob_vac[2];
210     //      printf("knobvac %f\n",z);
211     gMC->Gspos("0VAC",1,"0DIV",0,0,z,0,"ONLY");
212     //Steel pins + pin holes
213     gMC->Gsvolu("0PIN","TUBE",idtmed[8],ppins,3);
214     z=-pdivider[2]+ppins[2];
215     gMC->Gspos("0PIN",1,"0DIV",0,0,z,0,"ONLY");
216     gMC->Gsvolu("0HOL","TUBE",idtmed[11],phole,3);
217     z=-pdivider[2]+2*ppins[2]+phole[2];
218     gMC->Gspos("0HOL",1,"0DIV",0,0,z,0,"ONLY");
219     
220     //Socket
221     gMC->Gsvolu("0V1","TUBE",idtmed[4],pdiv1,3);
222     z=-pdivider[2]+pdiv1[2];
223     gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
224     //Resistors
225     gMC->Gsvolu("0V2","TUBE",idtmed[1],pdiv2,3);
226     z=pdivider[2]-pdiv2[2];
227     gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
228     gMC->Gsvolu("0RS","TUBE",idtmed[4],presist,3);
229     z=-pdiv2[2]+presist[2];
230     gMC->Gspos("0RS",1,"0V2",0,0,z,0,"ONLY");
231     gMC->Gsvolu("0RB","TUBE",idtmed[9],pribber,3);
232     z=pdiv2[2]-pribber[2];
233     gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
234     //      printf("z DRIB %f\n",z);
235        
236     
237 }    
238
239
240
241     
242 //------------------------------------------------------------------------
243 void AliSTARTv0::CreateMaterials()
244 {
245    Int_t isxfld   = gAlice->Field()->Integ();
246    Float_t sxmgmx = gAlice->Field()->Max();
247    Float_t a,z,d,radl,absl,buf[1];
248    Int_t nbuf;
249
250 // Scintillator CH
251    Float_t ascin[2]={1.01,12.01};
252    Float_t zscin[2]={1,6};
253    Float_t wscin[2]={1,1};
254    Float_t denscin=1.03;
255 // PMT glass SiO2
256    Float_t aglass[2]={28.0855,15.9994};
257    Float_t zglass[2]={14.,8.};
258    Float_t wglass[2]={1.,2.};
259    Float_t dglass=2.65;
260 // Ceramic   97.2% Al2O3 , 2.8% SiO2
261    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
262    Float_t aal2o3[2]  = { 26.981539,15.9994 };
263    Float_t zal2o3[2]  = { 13.,8. };
264    Float_t wal2o3[2]  = { 2.,3. };
265    Float_t denscer  = 3.6;
266
267 // Brass 80% Cu, 20% Zn
268    Float_t abrass[2] = {63.546,65.39};
269    Float_t zbrass[2] = {29,30};
270    Float_t wbrass[2] = {0.8,0.2};
271    Float_t denbrass=8.96;
272
273 //Ribber C6H12S
274    Float_t aribber[3] = {12.,1.,32.};
275    Float_t zribber[3] = {6.,1.,16.};
276    Float_t wribber[3] = {6.,12.,1.};
277    Float_t denribber=0.8;
278    /*
279 // Definition Cherenkov parameters
280    Float_t ppckov[14] = { 5.63e-9,5.77e-9,5.9e-9,6.05e-9,6.2e-9,6.36e-9,6.52e-9,6.7e-9,6.88e-9,7.08e-9,7.3e-9,7.51e-9,7.74e-9,8e-9 };
281    Float_t rindex_quarz[14] = { 1.528309,1.533333,
282                                 1.538243,1.544223,1.550568,1.55777,
283                                 1.565463,1.574765,1.584831,1.597027,
284                                 1.611858,1.6277,1.6472,1.6724 };
285  
286    Float_t absco_quarz[14] = { 20.126,16.27,13.49,11.728,9.224,8.38,7.44,7.17,
287                                 6.324,4.483,1.6,.323,.073,0. };
288    */
289    //   Int_t *idtmed = fIdtmed->GetArray()-999;
290     
291    //  TGeant3 *geant3 = (TGeant3*) gMC;
292     
293 //*** Definition Of avaible START materials ***
294    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
295    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
296    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999); 
297
298    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
299    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
300    char namate[21];
301    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
302    acer[0]=a;
303    zcer[0]=z;
304    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
305    acer[1]=a;
306    zcer[1]=z;
307    
308    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
309    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
310    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
311    
312    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
313    
314    
315    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
316    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
317    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
318    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
319    AliMedium(6, "Glass$", 4, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
320    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
321    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
322    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
323    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
324
325 //  geant3->Gsckov(idtmed[2105], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
326
327 }
328 //---------------------------------------------------------------------
329 void AliSTARTv0::DrawModule()
330 {
331 //
332 // Draw a shaded view of the Forward multiplicity detector version 0
333 //
334   
335   //Set ALIC mother transparent
336   gMC->Gsatt("ALIC","SEEN",0);
337   //
338   //Set volumes visible
339   gMC->Gsatt("0STA","SEEN",0);
340   gMC->Gsatt("0PMT","SEEN",1);
341   gMC->Gsatt("0DIV","SEEN",1);
342   //
343   gMC->Gdopt("hide","on");
344   gMC->Gdopt("shad","on");
345   gMC->SetClipBox(".");
346   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
347   gMC->DefaultRange();
348   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
349   gMC->Gdhead(1111,"T-Zero detector");
350   gMC->Gdopt("hide","off");
351 }
352
353 //-------------------------------------------------------------------
354 void AliSTARTv0::Init()
355 {
356 // Initialises version 0 of the Forward Multiplicity Detector
357 //
358 //Int_t *idtmed  = gAlice->Idtmed();
359   AliSTART::Init();
360   fIdSens1=gMC->VolId("0TOP");
361   printf("*** START version 0 initialized ***\n");
362  
363 }
364
365 //-------------------------------------------------------------------
366
367 void AliSTARTv0::StepManager()
368 {
369   //
370   // Called for every step in the START Detector
371   // See AliSTARTv1
372
373 }
374 //---------------------------------------------------------------------
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